I have a Dell 15 N5040. The CPU fan died on me for no reason. I removed the keyboard and palm rest to find that the laptop that was bought brand new was missing the "4th" screw -- the one the ties down part of the thermal assembly to the video chip. I replaced it with a new fan -- and the fan spins on high constantly and failed the Dell Diagnostics. So I decided to try ANOTHER new fan -- plugged it in and same thing. Can anyone tell me what the problem could be? Could it be the fourth screw it's missing? It's not dust buildup or heat issues. Thanks.
The Heat Sink and Fan Assembly on this system is installed using three screws only. Here are the pictures showing its dis-assembly:
You may refer to the link for http://bit.ly/12jN7Vb service manual of this system for detailed steps on replacing the hardware components.
Note: Please follow the safety instructions, before you replace any hardware component.
Please run the diagnostics on the system to confirm hardware functionality. Here are the steps:
Also, follow the steps listed on the link http://dell.to/Y7RuOY for troubleshooting the fan noise issue.
Please share the results.
The error code is: 2000-0511 Msg: Fan failed to respond correctly. Diagnostics show all RPM for high, middle and low are: 4801RPM for all.
The error message 2000-511 indicates fan failure. Please provide the validation code as well that you received along with the error message.
I recommend that you update the BIOS of the system to latest A05 version. Here are the steps:
Note: Make sure the ac adapter is connected and the battery is charged 10% or above to update the BIOS. Also, disconnect all the external peripherals before updating the BIOS. All the programs should be closed and documents saved.
Please observe the system performance after BIOS update. If the issue still persist hardware replacement may be required.
Please reply if you have any further questions.